We're looking to cosplay Vocaloid characters for Halloween, and this will be our first time actually purchasing wigs online. We'd like to ask for recommendations on which sites are reliable and have great quality wigs. 

V is going as Zatsune Miku, she'd like to find a place that sells Miku's hair but in black.

Estar is going as Gumi, she'd like to find a green haired wig.

I'm going as Mikuo, and I have no idea where to look. I've been surfing around, but most sites I've been to look kind of shady. 

Your help would be appreciated, even a good luck comment would be nice! 

-Sushi

To be honest, I haven't purchased an online wig yet, but I do know that one of the members on this site has made purchases from cosplaywigsusa and her wig turned out amazing!

http://cosplaywigsusa.com/character-cosplay-wigs/

They have some of the vocaloid wigs, and I have heard a handful of good reviews and a few bad reviews here and there but mainly good, so you should try to look at the feedback and reviews from that site. I'm planning to purchase from there soon :)

Cosplaywigusa is a great site, I think. I've never ordered wigs either but they have great reviews. I also know  cosplayfu.com. My friend ordered from there and it was awesome! They have wigs, cosplay clothes and accessories. They also do commission. I'm ordering stuff from that website for when I cosplay in April ;) There's also fm-anime.com. The wigs there look pretty decent and it's for a great price :D